Lasting-jack



R. NAGLE.

LASTING JACK.

Patented May 12,1891.

(No Model.)

UNITED STATES -PATENT OFFICE.

RICHARD NAGLE, OF LYNN, MASSACHUSETTS.

LASTING-JACIK.

SPECIFICATION forming part of Letters Patent No. 452,146, dated May 12,1891.

Application filed January 27, 1891. Serial No. 379,266- (No model.)

To aZZ whom it may concern.-

Be it known that I, RICHARD NAGLE, of Lynn, in the county of Essex.State of Massachusetts, have invented certain new and usefulImprovements in Clamps for Last-ing- Jacks, of which the following is adescription sufficiently full, clear, and exact to enable any personskilled in the art or science to which said invention appertains to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which Figure 1 is a sideelevation of a lasting- .jack, showing my improved clamp in position foruse, the standard of the jack being represented as broken off; Fig. 2, avertical transverse section of the same enlarged, taken on line 00 0c inFig. 1; and Figs. 3 and 4,elevations of the clamp-heads detached.

Like letters and figures of reference indicate corresponding parts inthe different figures of the drawings.

My invention relates especially to a clamp which is adapted to beadjustably mounted on a lasting-jack 'head and is designed to clamp orhold the shank portion of a boot or shoe upper onto the sole during theprocess of lasting; and it consists in certain novel features,hereinafter fully set forth and claimed, the object being to produce asimpler, cheaper, and more effective device of this character than isnow in ordinary use.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawings, A represents the jack considered as a whole, said jackbeingof the ordinary form and construction, provided with a slidingtoe-piece h and hinged heel-piece (I, mounted on a head or bar g, fittedto rotate on the standard h.

The clamp 13 consists of a body portion 2', having an opening j, wherebyit is fitted to slide longitudinally on the head g, and is secured inposition thereon by a set-screw 71-. The bodyi is extended laterally ateach side, forming ears or lugs m, to each of which avertically-arranged arm 1) is hinged or pivoted.

A rod q is hinged at 4* to one arm 13 and projects through a slot 25 inthe opposite arm 19. Theouterend of said rod is screw-threaded at r, anda nut 10 is turned thereon. Hinged to said nut there is a lever 1provided with a cam-head .2, which engages the slotted arm 1), and whendepressed into the horizontal position, as shown in Fig. 2, tends toforce said arms 1) toward each other.

To the upper end of each arm 29 an eccentric head 15 is pivoted byscrews 16 so as to swing on said arm. Said heads are provided withopenings 17 for the screws 16, whereby they may be adjusted verticallyon said arms. The upper or free ends of the heads have a flexible guardor padding 1S thereon to prevent them from cutting or injuring theleather.

In the use of my improvement the clamp is adjusted in any desiredposition on the head g by means of its set-screwk. The last 0 isdisposed on the jack in the usual manner with the upper in positionthereon. The clamp-heads 15 are swung from the arms 1), so that theirpadded edges 18 shall take on the last in the shank portion at the rearof the ball, as shown in Fig. 1. By depressing the cam-lever 1 the arms2) are drawn together and the heads 15 forced tightly against the last,gathering and holding the upper in the shank portion, when it may bereadily tacked to the sole.

This device avoids the necessity of employing the pinchers to gather theupper in the shank portion and prevents the material from being tornthereby, as frequently happens where pinchers are used.

I preferably employ rubber or similar material for the padding 18 on theheads 15, as greater friction is imparted thereby on the leather,causing it to be drawn more smoothly and tightly over the instep. Theprocess of lasting is greatly quickcned by the use of my clamp,and thedanger of longitudinal pull on the upper, whereby the shoe is frequentlymisshapen, is avoided.

Having thus explained my invention, what I claim is In a clamp forlasting-jacks, the combina tion, with the body mounted on the jackhead,arms hinged to the sides of the body, through said arms and through oneof the and a lever having a cam-head for pressing openings in each head,substantially as desaid arms simultaneously inward, of eocenscribed.trie clamp-heads, each provided with a num- RICIIARD NAGLE. 5 ber ofopenings and having an inwardly-bent Vitnesses:

upper end covered with a guard or padding 0. M. SHAW, of soft rubber,and screws passing outwardly K. DURFEE.

